Form 13-F position report

OCTAVE SPECIALTY GROUP INC

Reported by RIHO Partners LLC

OSG CUSIP 023139884 Manager CIK 0002112884

First reported at 546,569 shares this quarter.

New
% of reported 13F value 1.6% This manager · Q1 2026
Shares 546,569 Quarter-end amount reported
Reported value $2,541,546 Fair value at quarter end
Consecutive quarters held 1 Through Q1 2026

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2026-03-31 2541546
2026-06-30 3462064

Quarterly position history

How this manager's reported quarter-end position changed over time.

2 quarters
Quarterly reported position history for OCTAVE SPECIALTY GROUP INC held by RIHO Partners LLC.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q2 2026 Added 554,818 +8,249 (1.5%) 1.95% $3,462,064 2026-08-18
Q1 2026 New 546,569 +546,569 (0.0%) 1.6% $2,541,546 2026-05-15

Who else reported the position

182 managers reported OCTAVE SPECIALTY GROUP INC for Q1 2026.

Managers reporting OCTAVE SPECIALTY GROUP INC in Q1 2026.
Manager Activity Shares Change % of reported 13F Reported value Tenure
BlackRock Inc Reduced 3,917,798 -570,670 < 0.01% $18,217,762 7 qtrs
Western Standard LLC Reduced 2,247,591 -257,036 5.5% $10,451,298 7 qtrs
VANGUARD CAPITAL MANAGEMENT LLC New 1,945,076 +1,945,076 < 0.01% $9,044,603 1 qtr
PRESCOTT GROUP CAPITAL MANAGEMENT L L C Added 1,592,587 +699,070 0.74% $7,405,530 8 qtrs
Wolf Hill Capital Management LP Reduced 1,470,334 -418,639 0.66% $6,837,053 6 qtrs
GENDELL JEFFREY L Reduced 1,413,212 -156,260 0.09% $6,571,436 14 qtrs
THIRD AVENUE MANAGEMENT LLC Added 1,341,211 +559,118 1.01% $6,236,631 6 qtrs
DIMENSIONAL FUND ADVISORS LP Reduced 1,310,132 -375,495 < 0.01% $6,092,068 50 qtrs
Bain Capital Credit LP Unchanged 1,108,012 0 1.7% $5,152,256 7 qtrs
MARSHALL WACE LLP Added 1,065,335 +316,763 < 0.01% $4,953,807 9 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
March 31, 2026
Filed
May 15, 2026
Filing type
13F-HR
Position type
COM NEW

Voting authority reported

Sole
546,569
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.